Viagra was mainly created for men who are having certain problems in maintaining erections while having sex. This state is known to us as impotence. Growth in blood flow in the internal areas of penis mainly causes erection. What the Viagra does is provides effect that is produced by some specific chemical substances that release into penis simultaneously with a sexual arousal. This would enable growth of the blood flow in penis. Mostly Viagra is taken orally. It is usually taken approximately an hour before having sex. You can also consult a doctor in order in order to learn about the involved side effects. According to what all we have learnt from authorities, FDA has got no control over price of the drugs.

Controlling penile value

Viagra is a drug that has overcome two main problems. It does not relax the blood vessels of penis. However, it enhances natural process which would take place when sexually stimulated. It mainly does this by controlling the softeners, chemicals present in the body that are designed for making the penis become soft after the erection. When the man is sexually stimulated, the brain would send in some signal which triggers production of the chemicals which relaxes the penile blood vessels. Think of the hardeners. As blood vessels will get relaxed by production of the hardeners, the flow of blood would get increased also the penis would become erect.

Nature has designed a way for erection for gradually subsiding. At same time, hardeners are produced for relaxing the blood vessels. The body would also produce some softeners in order to break down also neutralize hardeners. There is an enzyme phosphodiesterase. As long as you are producing more of hardeners as compared to the softeners, penis is certain to remain erect. Soon production of the hardeners would start going down and the softeners would go upwards, thus causing erection to start to fizzle.  Erection dysfunction is caused due to the imbalance of the softeners and hardeners.

What Viagra does is blocking production of the softeners. It would allow hardeners for building up in penile blood vessels also creating a sustainable and a hard erection. Viagra cannot possibly take place of the stimulation. Instead, it would allow the natural chemicals that are created by the sexual stimulation continue doing their work. After the sex is over, brain would stop producing the hardeners and erection would subside. Viagra would wear out within four to five hours. Viagra makes me last longer, this concern should be now clear to you.